US601047A - Bicycle-lock - Google Patents

Description

w. SLINGERLANYD.

BICYCLE LOOK.

(No Model 1 No. 601,047. Patented Mar. 22,1898.

ATTORNEY- @UNITED STATES PATENT Erica.

WILLIAMSLINGERL'AND, OF JAMESTOWN, NEW YORK.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters Patent No. 601,047, dated March 22, 1898.

I I Application filed August 25, 1897. Serial No. 649,479. (No model.)

To all whom/it may concerni- Be it known that I,WILLIAM SLINGERLAND, a citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Bicycle-Locks,

of which the following is a full and complete specification, such as will enable those skilled in the'art to which it appertains to make and use the same.

- This'invention relates to bicycle-locks, and more particularly to a class thereof which is designed to be applied to the sprocket-chain.

The object of my invention is to provide a lock of the above-described class which can be attached to the chain in such a manner as will interfere with the rotation of the sprocketwheel andwhich can be permanently retained in this position until removed by some person who may be familiar with the combination of said lock. t

A further object isto provide a lock which is simple in construction, effective in operation, and inexpensive to manufacture.

The invention consists in the novel features of construction hereinafter described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings, Figure 1 is a view of a sprocket-wheel, showing a section'of the chain and my improved lock applied thereto.-

Fig. 2 is a view of said lock detached from said chain and partly in sect-ion. Fig. 3 is a plan view of the bottom portion of said lock. Fig. 4 is a view looking upward on the line 4 4 of Fig. 2, and Fig. 5 isa plan view of said lock.

Like-letters and numerals of reference refer to like parts throughout the several views. Referring to the accompanying drawings, which form a part of this specification, the letter A denotes thesprocket-wheel attached tothe pedal-axle of an ordinary wheel, and B denotes an ordinary sprocket-chain. To more fully understand my invention, it would be advisable to insert a brief description of this chain. The ordinary chain as now in use is comprised of two side plates, as 6, which with a solid plate pivoted between its ends metalto require even a most extraordinary effort to break the same.

My improved lock is composed of two detachable partsa lower part D and an upper is adapted to receive a rod d, attached at one end to a disk f and having centrally mounted on its other end a diamond-shaped plate g, the sharp points of which form two lugs adapted to slide within slots 13 in the cavity 1), as shown in Fig. 3. Made integrally with orfirmly attached to this upper section is a screw it, which is adapted to operate in the screw-thread in the cavity 1). These slots b extend beyond the greatest diameter of any portion of the cavity b, so that when in these slots the plate d will be incapable of revolving. The upper portion E is exteriorly shaped similarly to the lower part, so that the small cylindrical portion of a diameter equal to that of the bottom portion at a will fit properly between the plates of the sprocket-chain.

The disk f, by reason of the cylindrical cavity and rod d readily revolves when the plate 9 is free of the slots b b as in the cavity 19 This disk is provided with a series of characters which are designed to be brought in a certain relation with the top of the upper portion d, in order that the lugs on the plate 9 may be so brought in relation to the cavity in which it rests as to be capable of being withdrawn therefrom'; The slots 1) facilitate this withdrawal.

In operation my improved lock acts as follows: The up perand lower portions are placed one on each side of the chain and then united between the plates 6 6 of one link of the said chain by means of the screw-thread in the cavity 1) and the screw it, made integrally with or firmly attached to the top portion E, the lugs on the plate 9 having been inserted in the slots 19 b When said portions have ICO been united as above described, the disk f is turned, thus bringing the lugs on the plate g into contact with the upper portion of the cavity b securely locking said device, and prevent its being removed except bya person who is thoroughlyfamiliar with the necessary relative location of the characters on the disk f, and an indicator-point on the top of the portion E. The enlarged bases of the respective portions of the device maintain the lock in this relation to the chain until by a reversal of the operation above described a separation of said parts is accomplished.

By the construction above described it will be impossible for a person by a sense of touch to inform himself when the plate g is in its proper relation. When the upper portion E is screwed down to the fullest extent, this disk will revolve entirely free of the upper portion of this cavity, and if the upper portion is slightly unscrewed it is so bound against the disk as to prevent the rotation of the latter.

By the above-described means it will readilybe observed that the objects of my invention are attained. A look as above described is cheap in construction and will prevent the sprocket-wheel from being rotated while it is attached to the chain and is removable only by a party who is familiar with the necessary position of the various parts in order to unscrew the upper and lower portions.

Having fully described my invention, what I claim, and desire to have protected by Letters Patent, is

1. In a bicycle-lock, the combination of two parts united by means of a screw-thread, and a lock whereby the separation of said parts is rendered impossible except when said lock is in a previously-arranged relation with reference to said screw threaded parts, said parts respectively being provided with means whereby said parts are maintained in the proper relation to the object to which the lock is applied, substantially as shown and described.

2. In a bicycle-lock, two parts provided respectively with a screw-threaded cavity, and a screw-thread to operate in said cavity, vertical slots in said cavity adapted to receive a lug on a revoluble plate firmly attached to the screw bearing portion, said lug being adapted to come in contact with the lower edge of said screw-threaded cavity whereby said parts are locked, said parts respectively being provided with means whereby said parts are maintained in the proper relation to the object to which the lock is applied, substantially as shown and described.

3. In a bicycle-lock, two parts, provided respectively with a screw-threaded cavity, and a screw adapted to operate in said cavity, vertical slots in said cavity adapted to receive lugs on a revoluble plate attached to the screw bearing portion by means of a rod attached to the revoluble disk at the top thereof, said parts respectively being provided with means whereby said parts are maintained in the proper relation to the object to which the lock is applied, substantially as shown and described.

4. In a bicycle-lock, two parts provided respectively with a screw-threaded cavity, and a screw-thread adapted to operate in said cavity, vertical slots in said cavity adapted to receive lugs on a revoluble plate, a rcvoluble disk provided with a series of characters, and a connection between said plate and said disk, and an indicated point on said'lock whereby by means of the lugs on said plate the parts may be brought to a certain prearranged relation, said parts respectively being provided with an abutment, whereby said parts are maintained in the proper relation to the object to which the lock is applied, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 21st day of August, 1897.

\VILLIAM SLINGERLAND.

IV itnesses:

L. W. WILTsIE, \VILLIAM BOYD.

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